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Specially designed for motorcycle engines, this low volume Colortune maintains the compression ratio of the engine, ensuring better firing of the mixture. Simple to use, the Colortune spark plug has a glass insulator viewing window so that the combustion flame is visible. The kit also includes a viewscope with adjustable mirror so that the flame can be seen where engine access is restricted. The colour of the flame inside the cylinder shows the richness of the air:fuel ratio. A yellow flame indicates a rich mixture, a blueish white flame a weaker mixture whilst a Bunsen blue flame is usually correct - by adjusting the mixture screw the correct flame colour can be attained and the engine tuned accurately. This motorcycle Colortune kit is designed for use with a 12mm spark plug size.
- Colortune features a viewing window so the air:fuel ratio can be adjusted according to flame colour. Ideal for simple and effective engine tuning.
- Specially designed for motorcycle engines to maintain the compression ratio of the engine.
- Suitable for 12mm spark plugs.
- Kit includes: 12mm plug, hexagonal adaptor, angled cleaning brush and instructions.
- Replacement HT lead adaptor available, Part No. G4074/02.
Gunson Motorcycle Colortune Kit 12mm
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